Reloading Series: Converting Brass, Featuring 25 GPC

This guide details the process of loading and testing the experimental 17-5.56 KAK wildcat cartridge, aiming for record-breaking velocities. It covers cartridge preparation, projectile selection, and comprehensive testing including steel penetration and ballistic gel performance. The content highlights the expertise of Banana Ballistics in experimental ammunition development and high-velocity testing.

This video is the first part of a series exploring "wildcatting" for the AR-15 platform. The hosts, Brownells Gun Techs Caleb and Steve, explain that wildcat cartridges are non-commercial rounds developed by handloaders to fill specific needs. They highlight how many popular cartridges began as wildcats. The video introduces the concept of using existing AR-15 compatible case head sizes for new cartridge development, specifically focusing on a .25 GPC (General Purpose Cartridge) wildcat. This round uses a 6.8mm Remington SPC case necked down for a .257" bullet, promising improved ballistic coefficient and velocity. The demonstration involves loading Starline 6.8 SPC brass with Cutting Edge Bullets and using custom dies from Hornady. The custom AR-15 upper receiver for the .25 GPC features a barrel from Mad Dog Weapon Systems (MDWS), a company specializing in AR wildcatting.

This guide details the technical modifications involved in the Colt MARS PDW project, a miniaturized M4 variant chambered in a unique 5.56x30mm cartridge. It highlights the extensive part alterations, including receivers and internal components, and explains the rationale behind Colt's decision to shelve the project. The revival by Centurion Arms is also noted. Instruction is provided by Chris Bartocci, a recognized expert on the AR-15/M16 platform.

This video addresses a perceived issue with 22 Nosler brass by presenting an alternative solution. The presenter explores the possibility of forming 6mm Hagar Hornady brass for use in an AR platform with a 6.8 SPC bolt. The discussion aims to offer a practical workaround for those interested in or experiencing challenges with 22 Nosler ammunition, directing viewers to the Predator Masters Forums for further research and community discussion.

This guide details the complex process of reloading and fireforming the 6.5 Sherman Short Magnum cartridge, a wildcat round. It covers essential steps like necking down, turning, trimming, and fireforming using specific tools and techniques. The video also provides a detailed look at a custom rifle built for this cartridge, highlighting its components and performance at 400 yards.

This entry details the custom revolver work of John Linebaugh, focusing on his powerful .500 and .475 Linebaugh cartridges and their development. It highlights the technical features engineered for extreme recoil management, such as custom cylinders and sights, and discusses their application in big game hunting. The legacy of Linebaugh's pistolsmithing is also touched upon, noting his son's continuation of the craft.

This guide details the installation of a Geissele MK8 Super Modular Rail on an AR-15 platform. It covers securing the upper receiver, installing the barrel nut, gas system, and the rail itself, emphasizing the use of specialized tools and proper torque specifications. The process requires an intermediate skill level and careful attention to detail for a secure and functional build.

This guide, based on expert instruction from Brownells, details essential practices for proper ammunition storage. It emphasizes using airtight containers, managing humidity with desiccants, and maintaining stable temperatures to ensure ammunition reliability and safety. Proper storage is crucial for preventing corrosion and propellant degradation, especially for sensitive components like primers.

This guide details the process of upgrading an AR-15 from standard A2 furniture to Magpul components. It covers the removal of the A2 pistol grip and installation of the Magpul MIAD Grip and Magpul PRS Stock. The video demonstrates efficient assembly using specialized tools, highlighting the ergonomic benefits and adjustability of the Magpul parts. Instruction is provided by Brownells, a recognized industry authority.

This entry details the creation of a movie prop suppressor for a Remington 11-87 used in 'No Country for Old Men.' Prop master Larry Zanoff explains how the suppressor was designed to look homemade and was non-functional, with sound effects added in post-production. The process highlights the creative problem-solving involved in film armory.